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  <title>Fetch data specified by key</title>
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  <div id="layout-content"><div id="function.dba-fetch" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">dba_fetch</h1>
  <p class="verinfo">(PHP 4, PHP 5, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">dba_fetch</span> &mdash; <span class="dc-title">Fetch data specified by key</span></p>

 </div>
 <div class="refsect1 description" id="refsect1-function.dba-fetch-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="methodname"><strong>dba_fetch</strong></span>(<span class="methodparam"><span class="type"><span class="type">string</span>|<span class="type">array</span></span> <code class="parameter">$key</code></span>, <span class="methodparam"><span class="type">resource</span> <code class="parameter">$dba</code></span>, <span class="methodparam"><span class="type">int</span> <code class="parameter">$skip</code><span class="initializer"> = 0</span></span>): <span class="type"><span class="type">string</span>|<span class="type"><span class="type false">false</span></span></span></div>

  <p class="simpara">
   Discouraged overloaded signature:
  </p>
  <div class="methodsynopsis dc-description"><span class="methodname"><strong>dba_fetch</strong></span>(<span class="methodparam"><span class="type">string</span> <code class="parameter">$key</code></span>, <span class="methodparam"><span class="type">int</span> <code class="parameter">$skip</code></span>, <span class="methodparam"><span class="type">resource</span> <code class="parameter">$dba</code></span>): <span class="type">string</span></div>

  <p class="para rdfs-comment">
   <span class="function"><strong>dba_fetch()</strong></span> fetches the data specified by
   <code class="parameter">key</code> from the database specified with
   <code class="parameter">dba</code>.
  </p>
 </div>

 <div class="refsect1 parameters" id="refsect1-function.dba-fetch-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>
    
     <dt>
<code class="parameter">key</code></dt>

     <dd>

      <p class="para">
       The key the data is specified by.
      </p>
      <blockquote class="note"><p><strong class="note">注意</strong>: 
       <p class="para">
        When working with inifiles this function accepts arrays as keys
        where index 0 is the group and index 1 is the value name. See:
        <span class="function"><a href="function.dba-key-split.html" class="function">dba_key_split()</a></span>.
       </p>
      </p></blockquote>
     </dd>

    
    
     <dt>
<code class="parameter">dba</code></dt>

     <dd>

      <p class="para">
       The database handler, returned by <span class="function"><a href="function.dba-open.html" class="function">dba_open()</a></span> or
       <span class="function"><a href="function.dba-popen.html" class="function">dba_popen()</a></span>.
      </p>
     </dd>

    
    
     <dt>
<code class="parameter">skip</code></dt>

     <dd>

      <p class="para">
       The number of key-value pairs to ignore when using cdb databases.
       This value is ignored for all other databases which do not support
       multiple keys with the same name.
      </p>
     </dd>

    
   </dl>

  </p>
 </div>


 <div class="refsect1 returnvalues" id="refsect1-function.dba-fetch-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   Returns the associated string if the key/data pair is found, <strong><code>false</code></strong> 
   otherwise.
  </p>
 </div>


 <div class="refsect1 changelog" id="refsect1-function.dba-fetch-changelog">
  <h3 class="title">更新日志</h3>
  <table class="doctable informaltable">
   
    <thead>
     <tr>
      <th>版本</th>
      <th>说明</th>
     </tr>

    </thead>

    <tbody class="tbody">
     <tr>
      <td>8.2.0</td>
      <td>
       <span class="function"><strong>dba_fetch()</strong></span>&#039;s optional skip argument is now at the end
       in line with PHP userland semantics. The previously overloaded signature
       is still accepted but discouraged.
      </td>
     </tr>

    </tbody>
   
  </table>

 </div>


 <div class="refsect1 seealso" id="refsect1-function.dba-fetch-seealso">
  <h3 class="title">参见</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><span class="function"><a href="function.dba-exists.html" class="function" rel="rdfs-seeAlso">dba_exists()</a> - Check whether key exists</span></li>
    <li class="member"><span class="function"><a href="function.dba-delete.html" class="function" rel="rdfs-seeAlso">dba_delete()</a> - Delete DBA entry specified by key</span></li>
    <li class="member"><span class="function"><a href="function.dba-insert.html" class="function" rel="rdfs-seeAlso">dba_insert()</a> - Insert entry</span></li>
    <li class="member"><span class="function"><a href="function.dba-replace.html" class="function" rel="rdfs-seeAlso">dba_replace()</a> - Replace or insert entry</span></li>
    <li class="member"><span class="function"><a href="function.dba-key-split.html" class="function" rel="rdfs-seeAlso">dba_key_split()</a> - Splits a key in string representation into array representation</span></li>
   </ul>
  </p>
 </div>

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